Christos' research interests include data/information management, large-scale distributed systems, digital libraries, and data/user anonymity. He has published more than 80 papers in book chapters, top-ranked international journals, and highly selective, peer-reviewed international conferences and workshops. His publication record includes highly prestigious journals and conferences in the area of information management such as TOIS, TKDE, SIGIR, SIGMOD, ICDE, EDBT, ECIR and others. Apart from his highly selective publication record, the international impact of his work is also demonstrated by his extensive community service as a editor/reviewer/program committee member of more than 50 different venues including top-ranked journals/conferences. Moreover, his teaching record is extensive (more than 15 different under-/post-graduate courses) with courses spanning from big data management, to artificial intelligence, data mining, information retrieval, and web technologies. His expertise in the field is also demonstrated by three best paper awards/nominations at international conferences, a prestigious DELOS Award in Digital Library technologies (prize 4000 EUR), and two scholarships he has received from the national scholarship foundation (IKY). He is also a given a wide range of invited talks including universities and research centers in Germany (MPII, L3S), the Netherlands (CWI), Belgium (ERA), Cyprus (UoC), Italy (BiCi), Austria (TUWien), and Saudi Arabia (KAUST).